function testEmail(str) {
    var reg = /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/;
    if (reg.test(str)) {
        return true;
    } else {
        return false;
    }
}

function is_phone(str) {
    var ret = true;
    str = trim(str);
    if (isNaN(str))
    {
        ret = false;
    }
    if (str.length < 11)
        ret = false;
    return ret;
}

function randomString(len) {
    len = len || 32;
    var $chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';    //默认去掉了容易混淆的字符oOLl,9gq,Vv,Uu,I1
    var maxPos = $chars.length;
    var pwd = '';
    for (i = 0; i < len; i++) {
        pwd += $chars.charAt(Math.floor(Math.random() * maxPos));
    }
    return pwd;
}

function random_num(len) {
    len = len || 32;
    var $chars = '1234567890';
    var maxPos = $chars.length;
    var pwd = '';
    for (i = 0; i < len; i++) {
        pwd += $chars.charAt(Math.floor(Math.random() * maxPos));
    }
    return pwd;
}

function shake(ele, cls, times) {
    var i = 0, t = false, o = ele.attr("class") + " ", c = "", times = times || 2;
    if (t)
        return;
    t = setInterval(function () {
        i++;
        c = i % 2 ? o + cls : o;
        ele.attr("class", c);
        if (i == 2 * times) {
            clearInterval(t);
            ele.removeClass(cls);
        }
    }, 200);
}

function ltrim(s) {
    s = s.replace(/(^[' '|'　']*)/, '');
    return s.replace(/(^\s*)/, "");
}
function rtrim(s) {
    s = s.replace(/([' '|'　']*$)/, '');
    return s.replace(/(\s*$)/, "");
}
function trim(s) {
    return rtrim(ltrim(s));
}

function checkCardId(socialNo) {
    if (socialNo == '' || socialNo.length != 0) {
        return true;
    }
    if (socialNo.length != 15 && socialNo.length != 18) {
        return (false);
    }
    var area = {11: "北京", 12: "天津", 13: "河北", 14: "山西", 15: "内蒙古", 21: "辽宁", 22: "吉林", 23: "黑龙江", 31: "上海", 32: "江苏", 33: "浙江", 34: "安徽", 35: "福建", 36: "江西", 37: "山东", 41: "河南", 42: "湖北", 43: "湖南", 44: "广东", 45: "广西", 46: "海南", 50: "重庆", 51: "四川", 52: "贵州", 53: "云南", 54: "西藏", 61: "陕西", 62: "甘肃", 63: "青海", 64: "宁夏", 65: "新疆", 71: "台湾", 81: "香港", 82: "澳门", 91: "国外"};

    if (area[parseInt(socialNo.substr(0, 2))] == null) {
        return (false);
    }
    if (socialNo.length == 15) {
        pattern = /^\d{15}$/;
        if (pattern.exec(socialNo) == null) {
            return (false);
        }
        var birth = parseInt("19" + socialNo.substr(6, 2));
        var month = socialNo.substr(8, 2);
        var day = parseInt(socialNo.substr(10, 2));
        switch (month) {
            case '01':
            case '03':
            case '05':
            case '07':
            case '08':
            case '10':
            case '12':
                if (day > 31) {
                    return false;
                }
                break;
            case '04':
            case '06':
            case '09':
            case '11':
                if (day > 30) {
                    return false;
                }
                break;
            case '02':
                if ((birth % 4 == 0 && birth % 100 != 0) || birth % 400 == 0) {
                    if (day > 29) {
                        return false;
                    }
                } else {
                    if (day > 28) {
                        return false;
                    }
                }
                break;
            default:
                return false;
        }
        var nowYear = new Date().getYear();
        if (nowYear - parseInt(birth) < 15 || nowYear - parseInt(birth) > 100) {
            return false;
        }
        return (true);
    }

    var Wi = new Array(
            7, 9, 10, 5, 8, 4, 2, 1, 6,
            3, 7, 9, 10, 5, 8, 4, 2, 1
            );
    var lSum = 0;
    var nNum = 0;

    for (i = 0; i < 17; ++i)
    {

        if (socialNo.charAt(i) < '0' || socialNo.charAt(i) > '9')
        {
            return (false);
        } else
        {
            nNum = socialNo.charAt(i) - '0';
        }
        lSum += nNum * Wi[i];
    }

    if (socialNo.charAt(17) == 'X' || socialNo.charAt(17) == 'x')
    {
        lSum += 10 * Wi[17];
    } else if (socialNo.charAt(17) < '0' || socialNo.charAt(17) > '9')
    {
        return (false);
    } else
    {
        lSum += (socialNo.charAt(17) - '0') * Wi[17];
    }

    if ((lSum % 11) == 1)
    {
        return true;
    } else
    {
        return (false);
    }

}

function colorful(id) {
    var t = false, color_array = new Array("#ff0000", "#ff6600", "#3366cc", "black");
    var i = 0;
    if (t)
        return;
    t = setInterval(function () {
        var o = document.getElementById(id);
        o.style.color = color_array[i];
        i++;
        if (i == color_array.length)
            i = 0;
    }, 1000);
}